28551193 has 4 divisors (see below), whose sum is σ = 31146768. Its totient is φ = 25955620.

The previous prime is 28551191. The next prime is 28551209. The reversal of 28551193 is 39115582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28551193 - 2¹ = 28551191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28551191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297771 + ... + 1297792.

It is an arithmetic number, because the mean of its divisors is an integer number (7786692).

Almost surely, 2^28551193 is an apocalyptic number.

It is an amenable number.

28551193 is a deficient number, since it is larger than the sum of its proper divisors (2595575).

28551193 is a wasteful number, since it uses less digits than its factorization.

28551193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595574.

The product of its digits is 10800, while the sum is 34.

The square root of 28551193 is about 5343.3316385940. The cubic root of 28551193 is about 305.6385189939.

The spelling of 28551193 in words is "twenty-eight million, five hundred fifty-one thousand, one hundred ninety-three".